It looks as if the concept of a 'snapmirror lag' has been scrubbed from Clustered OnTap, at least on 8.1.2P3.  'snapmirror show' will show the state, and transferring, but there's no lag, or a start time that I can extrapolate.  There's a progress, which reports what's been transferred, but no lag.  

The api documentation doesn't have any mention of snapmirror lag in snapmirror-info attributes-list.  There's no support of snapmirror in snmp (at least so far).  So does DFM (or whatever they call it now) monitor this?  And how would it?

Thanks for any and all suggestions.  If I find where this data is, I'll put the script on github.

-Blake